不同生育期倒伏胁迫下玉米叶面积指数高光谱响应解析

周龙飞,张云鹤,成枢,顾晓鹤,杨贵军,孙乾,束美艳

Analysis of Hyperspectral Response of Maize Leaf Area Index under Lodging Stress under Different Frowth Stages

Longfei Zhou,Yunhe Zhang,Shu Cheng,Xiaohe Gu,Guijun Yang,Qian Sun,Meiyan Shu

表2 不同生育期LAI分期与统一监测模型拟合及验证

Table 2 Fitting and verification of LAI staging and unified monitoring model in different growth stages

生育期	光谱变换形式	模型	建模		验证
生育期	光谱变换形式	模型	R²	RMSE	R²	RMSE
抽雄期 n=90	R	Y=1.9934+30.0297X₅₇₀+17.1176X₇₉₇-18.392X₈₄₇	0.51	0.50	0.43	0.89
	R^’	Y=2+233394X₁₀₄₂+101434X₈₂₉-851918X₅₉₂	0.49	0.61	0.49	0.93
	Gqc	Y=2.7-192.283X₄₂₃-574.332X₅₀₂-314.641X₅₅₃	0.52	0.49	0.47	0.93
	1/R	Y=4.7513-0.0024X₅₇₀+0.0633X₇₄₇-0.0649X₇₉₇	0.45	0.53	0.47	0.72
	(1/R)^’	Y=4.086-8.54X₅₆₉+784.645X₁₂₇₃-0.914X₁₄₁₃	0.57	0.47	0.50	0.87
	LogR	Y=2.2922+3.5107X₅₇₀-14.6405X₇₄₇+12.5062X₇₉₇	0.53	0.49	0.46	0.86
	(LogR)^’	Y=2-30963X₅₉₂-24036X₆₃₂-148094X₁₂₇₃	0.38	0.64	0.53	0.64
灌浆期 n=45	R	Y=3.1042+75.934X₅₁₄-63.8761X₆₉₄-0.1667X₁₃₉₄	0.49	0.30	0.39	0.35
	R^’	Y=2-1011768X₄₈₈+346249X₁₂₉₁-293886X₁₇₀₁	0.53	0.50	0.48	0.64
	Gqc	Y=3.3918+19.2917X₇₂₇+61.2472X₉₁₀+38.5977X₁₀₀₂	0.33	0.34	0.31	0.26
	1/R	Y=2.5971-0.0052X₆₄₃+0.0087X₆₉₈-0.0078X₉₂₇	0.45	0.31	0.20	0.28
	(1/R)^’	Y=2.887+34.149X₄₇₁+209.1X₉₅₉+45.732X₁₇₈₂	0.45	0.31	0.45	0.20
	LogR	Y=3.5553+11.6392X₆₄₆-13.6134X₆₉₆+1.6202X₉₂₇	0.46	0.31	0.23	0.21
	(LogR)^’	Y=2.9-70874.4X₄₈₈-24756.3X₉₅₈-82671X₁₇₀₁	0.53	0.29	0.44	0.30
统一模型 n=153	R	Y=2.9377+16.4219X₅₇₀+35.3918X₉₂₂-40.4395X₉₉₇	0.38	0.49	0.34	0.54
	R^’	Y=2-90260X₅₂₉-503099X₅₉₁-82177X₉₄₉	0.42	0.65	0.35	0.68
	Gqc	Y=2.347+276.833X₆₃₇-10.516X₇₁₃-22.254X₇₉₀	0.36	0.50	0.38	0.54
	1/R	Y=3.3648-0.0007X₅₇₀-0.0516X₉₁₅+0.0501X₉₆₅	0.24	0.51	0.29	0.52
	(1/R)^’	Y=3.177-2.21X₅₆₇+275.282X₈₃₀+484.548X₁₂₇₃	0.38	0.49	0.36	0.52
	LogR	Y=3.0063+1.2543X₅₇₀+13.7051X₉₁₆-14.6696X₉₆₆	0.31	0.51	0.35	0.50
	(LogR)^’	Y=3-31950X₄₅₉-9256X₅₆₀-12809X₁₂₇₄	0.41	0.51	0.36	0.53